3 years ago

Which of the following would cause the greatest decrease in gravitational force between the earth and the moon?

Physics

2 answers:

Marat540 [252]3 years ago

7 0

Answer:

A decrease in the distance between the earth and the moon.

mario62 [17]3 years ago

5 0

The Answer is D I think

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In your physics lab you are given a 10.1-kg uniform rectangular plate with edge lengths 68.7 cm by 47.5 cm. Your lab instructor

VladimirAG [237]

Answer:

2.35 kgm^2

Explanation:

we take length 68.7 cm as x-axis and 47.5 cm as y-axis then the axis about which we have to find out moment of inertia will be z-axis.

moment of inertia about x-axis

$I_x = ML^2 /3 = 10.1\times 0.4752 /3 = 0.7596$ kg-m2

$I_y = 10.1\times 0.6872 / 3 = 1.5889 kgm^2$

by perpendicular axis theorem

$I_z = I_x + I_y = 0.7596 + 1.5889 = 2.35 kgm^2$

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3 years ago

Find the velocity of a baseball thrown 78 m from third base to first base in 30 sec

ankoles [38]

Answer:

V=2.6m/s

Explanation:

velocity=Distance/time

V=78/30=2.6m/s

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3 years ago

A billiard ball moving at 5 m/s strikes a stationary ball of the same mass. After the collision, the original ball moves at a ve

SIZIF [17.4K]

90 degrees - 30 = 60 degrees

Velocity = (5m/s - 4.35m/s x cos(30)) / cos(60)

Velocity = 2.47 m/s

The answer is D) 2.47 m/s at 61.9 degrees

8 0

3 years ago

What affect does an increase in the angle of incidence have upon the angle of reflection?

valentina_108 [34]

????????????? ??????????????????? ?????????????????

6 0

3 years ago

Light shines through atomic Hydrogen gas. It is seen that the gas absorbs light readily at a wavelength of 91.65 nm. What is the

hoa [83]

Answer:

n = 19

Explanation:

$\lambda$ = Wavelength of the light absorbed = 91.65 nm = 91.65 x 10⁻⁹ m

$n_{2}$ = nth level = n

$n_{1}$ = 1

Using conservation of energy

$\frac{hc}{\lambda} = (13.6\times1.6\times10^{-19}) (\frac{1}{n_{1}^2} - \frac{1}{n_{2}^2} )\\\frac{(6.63\times10^{-34})(3\times10^{8})}{(91.65\times10^{-9})} = (13.6\times1.6\times10^{-19}) (\frac{1}{1^2} - \frac{1}{n^2} )\\2.17\times10^{-18} = (21.76\times10^{-19}) (\frac{1}{1^2} - \frac{1}{n^2} )\\n = 19$

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3 years ago